Failing to Monitor Macroparticles?
That Could Be a Big Mistake!

Macroparticles Matter

Cleanrooms are classified by cleanliness levels, determined by the number and size of particulates in a cubic meter of air, as per ISO 14644-1 standards. These standards measure particle sizes of ≥0.1 µm, ≥0.2 µm, ≥0.3 µm, ≥0.5 µm, ≥1 µm, and ≥5 µm, primarily focusing on smaller microparticles.

However, it's also crucial to monitor macroparticles larger than 5 µm, as they can behave differently and impact cleanroom operations if not included in environmental monitoring.

This piece from Valutek's Cleanroom Catastrophes Case Study Series highlights the real-world consequences of failing to monitor macroparticles and common practice mistakes by addressing the following key questions:

• Why should we care about particles greater than 5 µm?
• Why is there confusion about macroparticles?
• Why are macroparticles hard to count?

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